5.0 Scope of Services - Specifications and Requirements 5.1. General Specifications A. Basis of Design: AHU must conform to OUHSC campus standards detailed in the mechanical and electrical specification documents attached in the Buyer Attachments section. Preferred design is Temtrol. Alternative designs will be evaluated upon submittal package review based on heat transfer performance, electrical performance, acoustic performance, and dimensional/clearance requirements. (Drawings, detailed electrical specifications, and detailed mechanical specifications are uploaded into the Buyer Attachments section, and should be considered in addition to the details provided in this scope of work.) B. Demountable Construction: o Factory-assembled units designed for demountable modular reassembly onsite, requiring no structural building modifications. o Supplied with adequate gasket material, caulking, and hardware for field reassembly per manufacturer’s specifications. C. Factory Fabrication: o Units shall include a full perimeter welded base frame, 4-inch polyurethane-insulated floor, and walk-on steel safety grating for all serviceable interior sections. o Double-wall construction with minimum 20-gauge galvanized steel interior liner, 16-gauge galvanized steel exterior, and non-compressed 3- inch fiberglass insulation. o Access doors with solid double-wall insulation, extruded aluminum frames, UV-protected windows, die-cast zinc hinges, and OSHA-approved safety latches. 5.2 Specific Unit Requirements A. Fans: o Direct-drive plenum fan array with a minimum of Class III duty rating. o Each fan cube to fit through a 30” door and include shaft grounding to prevent electrical bearing damage. o Provided with individual back-draft dampers, NEMA 4 motor overload protection panel, and factory-mounted VFDs (two, to control 50% of fans each). B. Coils: o Chilled water and heating water coils with durable construction and factory testing. o 304 stainless steel drain pans under both coil sections with drain connections to floor drains. C. UV Lights: Factory-mounted UV lights on drain pan side of cooling coil with all necessary safety switches. D. Filters: o 24” x 24” and 12” x 24” MERV 13 bag filters for front-load arrangement. o Equipped with 2-inch diameter magnehelic gauges for pressure drop measurement. E. Air Dampers: Integrated factory-installed outside air and return air dampers. F. Electrical: o 115V LED light fixtures with protective guards in each access section, controlled by a single switch. o Factory-provided 460/3/60 service disconnect and compliant electrical components for seamless integration. 5.3 Piping and Hydronic Connections A. Connection Requirements: o Supply and return lines fitted with shut-off and balancing valves. o Manual air vents and accessible drains on high and low points. B. Prohibited Systems: o Pro-press connections are not approved. C. Insulation: o Reinsulate all ducts and piping with equivalent material as existing, ensuring no duct liner. 5.4 Job Specifications A. Demo and Disposal: o Remove existing AHU, exhaust fan, ductwork, heat recovery coils, associated piping, legacy controls, panels, cabinets, electrical, and wiring per prints provided. B. Relocation and Coordination: o Relocate infrastructure as needed for installation and schedule chilled water/heating water outages with weather dependency considerations. C. Installation: Install new AHU and related components per manufacturer’s specifications and local codes. D. Electrical Integration: o Provide electrical connections for lights, plugs, UV bulbs, VFDs, and ensure field connections for demounts. E. Control System: o Provide and install a new control system, including all wiring, valves, sensors, and actuators per specifications. Programming must align with provided sequence of operations and N4 open protocol (as listed in page 8 of AHU Blueprints in Buyer Attachments section). F. Factory Startup and Inspections: o Contractor to provide factory startup for VFDs and AHU components. Coordinate with Campus Fire Marshall for safety inspections. G. Lead Times and Scheduling: o Provide lead times for parts and equipment. Submit a project timeline covering the entire duration. Work shall not commence until all critical components have been procured. Schedule needs to be coordinated with University personnel so operations are least affected.
